diff --git a/app/models/topic_embed.rb b/app/models/topic_embed.rb
index 7321b32f0..8b7ffd09b 100644
--- a/app/models/topic_embed.rb
+++ b/app/models/topic_embed.rb
@@ -4,7 +4,6 @@ class TopicEmbed < ActiveRecord::Base
   belongs_to :topic
   belongs_to :post
   validates_presence_of :embed_url
-  validates_presence_of :content_sha1
 
   def self.normalize_url(url)
     url.downcase.sub(/\/$/, '').sub(/\-+/, '-')
diff --git a/db/migrate/20140402201432_make_content_sha1_nullable.rb b/db/migrate/20140402201432_make_content_sha1_nullable.rb
new file mode 100644
index 000000000..29b7572ed
--- /dev/null
+++ b/db/migrate/20140402201432_make_content_sha1_nullable.rb
@@ -0,0 +1,5 @@
+class MakeContentSha1Nullable < ActiveRecord::Migration
+  def change
+    change_column :topic_embeds, :content_sha1, :string, :limit => 40, :null => true
+  end
+end
diff --git a/spec/models/topic_embed_spec.rb b/spec/models/topic_embed_spec.rb
index e75ea0a98..81b246373 100644
--- a/spec/models/topic_embed_spec.rb
+++ b/spec/models/topic_embed_spec.rb
@@ -5,8 +5,6 @@ describe TopicEmbed do
   it { should belong_to :topic }
   it { should belong_to :post }
   it { should validate_presence_of :embed_url }
-  it { should validate_presence_of :content_sha1 }
-
 
   context '.import' do